I was trying to find a list of some of the pulpiest modules that TSR produced that might fit, with modification, into Hyperborea Campaign. Here is a small list. Have I missed any?

B2 Keep on the Borderlands
B4 The Lost City
C1 The Hidden Shrine of Tamoachan
I1 Dwellers of the Forbidden City
I2 Tomb of the Lizard King 
I3-5 Desert of Desolation
 I7 Baltron's Beacon
N1 Against the Cult of the Reptile God
S1 Tomb of Horrors
S3 Expedition to the Barrier Peaks
S4 The Lost Caverns of Tsojcanth
U1 The Sinister Secret of Saltmarsh
U2 Danger at Dunwater
UK6 All That Glitters...
WG4 The Forgotten Temple of Tharizdun
WG6 Isle of the Ape
X1 The Isle of Dread
X2 Castle Amber
X4 Master of the Desert Nomads
X5 Temple of Death
X8 Drums on Fire Mountain

Jimm.Iblis wrote:

'Adventure Actions and Procedures' start on pg 253 (254 of the pdf). They're further detailed under 'Time' and 'Movement' on pg 256 (257 of the pdf).
They aren't formalized into steps, though.

Yeah. That's exactly what I mean. In the B/X, BECMI, AD&D, OSRIC, and OSE rules those steps are laid out. I think it would be helpful if they were included in a future edition of Hyperborea. 

For example:

OSRIC on page 145 notes the following steps for Dungeon Crawls... (Which is virtually the same as OSE). 

1. Wandering Monster Check
2. Statement of Actions
3. Encounters
4. Book-Keeping

And on page 150, OSRIC notes the steps for Wilderness Hex-Crawls (see page X23 in Cook-Marsh):

1. Weather
2. Navigation
3. Wandering Monster Check
4. Move and Act
5. Encounter
6. Camp
7. Wandering Monster Check & Encounter

And OSE, (from the SRD), has steps for an Encounter (page B23 in Moldvay) which has not yet turned into combat: 

1. Surprise
2. Encounter distance
3. Initiative
4. Actions and response
5. Conclusion

Now, I know these steps and so will most of players familiar with either the Basic or Advanced lines of D&D. But I think that newish players coming from 3e-5e and looking into Hyperborea for the first time could use these actually in the Hyperborea books.

Unlike the Combat Steps and Sequence on pages 265 & 267 of the Player’s Manual, I do not see similar sequences for Dungeons, Wilderness Exploration, or Encounters. I’m assuming I can just use the B/X (OSE) ones?

For example there are steps and sequences for Encounters, for Dungeon Crawling, and Wilderness Exploration. I could simply use the B/X procedures but if there are some in the Hyperborea books I missed I’d like to know.

Are there any rules for fright or horror? Often in pulp stories, especially CAS and Lovecraft horror at otherworldly monstrosities is a thing. Any rules to reflect that?

Hey. I'm Matteus. I have always loved Robert E. Howard's Conan stories. My love for Sword and Sorcery fiction eventually led me to D&D. I was introduced to the game during the 4e period with Pathfinder 1e. I played a lot of 5e until I found out about B/X and OSE (which I think are far superior). I had also developed an interest in the Greyhawk setting because it was the most "Sword and Sorcery" of the standard TSR settings. 

When I heard about Hyperborea, I thought it might be something I'd enjoy based on my fondness for Howard Sword and Sorcery fiction. I'm glad I did check it out. What I love about this setting, (beyond it's pulpy goodness), is that it is just detailed enough. There is lots of room to expand, explore, develop, and "make it your own". There isn't a "expanded universe" of lore you might run afoul of. There are whole sections of the map which are yours to do with as you will. That's awesome. 

I wish I'd heard about it during the kickstarter! But, at least I've put in the order for the 3e bundle. In the meantime, the PDFs will do! Great to be here.